机器的设计应当足够清晰，使用户能够搞清楚该把各个部件安装在何处。
Ideally, the machine's design would be clear enough to allow users to figure out where to put those parts.
发现号的最后11天的任务中包括两次太空行走进行维护和部件安装工作。
Two space walks for maintenance work and component installation are scheduled during the 11-day mission, Discovery's last.
我想试试将那个新部件安装在汽车引擎上-尽管这活实际上是汽车修理站的事。
I will have a crack at putting that new part in the car engine - though it is really a job for the garage.
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